https://begriffs.com/posts/2021-11-28-practical-parsing.html
bison location tracking manual entry
https://www.gnu.org/software/bison/manual/html_node/Tracking-Locations.html#Tracking-Locations
getting column and line number
https://stackoverflow.com/questions/656703/how-does-flex-support-bison-location-exactly
look into YYLLOC_DEFAULT from hello.tab.c,
maybe it keeps track of location information?